Air and gas engine.



.Es T. DUNN. ma mi) -GAS'ENGINE A??EICATIN FILED APB. '28, 1903.

Patented Nov. 10, 1908.

Nw x w @i 1Q/Virussen. ggfmif UNi-TED STA-WENT onirica.

HUGH .T. DUNN, or NEW Your, N.Y., AssieNon or oNE-iiLiLr'ro BENJAMIN A. JAcKsoN', 1

- oF-NEW YORK, N. Y.

AIR AND GAS ENGINE.

. Specification of-LettersPatent.

Patented Nov. 1o, 196s.

I Original application filed January l22, 1902, Serial No. 9l),851.i Divided and this application filed April 28, 1903.

' Serial No. 154,677.

'To vall' whom .it may concern:

'Be 1t known that I, `HUGH T. DUNN, a cit-izen of the United States, and a resident of New York, inthe county of New 'York and State of New York, have-invented a new and useful vImprovement in Air andG'as Engines, of which the following is a specification.-

' My invention relates to an improvement in explosive Y engines. and4 is designed to be used in connection with the motors set fort-h in. niy co-pending application, ySerial No.

-.)Q,851, tiled' January 22, 1902-, of which this invent-ion is a divisional part. The obj ect of my invention is to provide a device'of the character set. forth which is Operated by the motor shaft 'and in which the explosion occurs, the effects or-force thereof being conveyed directly to the inlet ports of the motor.

To this endmyinvention consists of an explosive or combustion chamber-and means for charging the .explosion chamber. In -addition to' this, my invention coinprises a novel means for storing a portion 'of the explosive charge, means for exploding the ,charge and many'otlier details of construction' 'and combinations of parts such as will bebrought out more fullyfhereinafter and particularly pointed out in theclaims.

In the accompanying drawings', Figure 1 is a view in side elevationof my improved combustion chamber and its connected parts,

. F ig. 2 is a view in side elevation partly in section ofthe explosive chamber, Fig. 3 .is a View in side elevation.

" A, indicates the main or line shaft which is to be rotated by the motor or motors (not .compressor and projects out through the wall of the air tight chamber D, in which the entire mechanism is inclosed.

' means of the eccentric rod 7 9.

Leading into the air .tight chamber D, from any suitable source is the main air pipe 70,.w hich pipe isprovided with branches 71, 7l leading to the two'inlet ports 36,v 36 of theconipressor B, and situated at the junc-- ture of thebranch pipes 71, 71 With'the main-pipe 70 is 'a three-way valve 73, the

. valve stem of which 'extends outside .the

chamber and isconnected by means of a link @GSM-'ith a universal lever 69.

Outside the casing or chamber D, is a second pipe 74 designed to conveythegas, h ydrocarbon or.- other explosive agent from any suitable source to the air p'ipe 70 with which it is joined by 'means of coii1iectio1i" 75. Thus it `will be seen that commingled air and hydrocarbon are permit-ted to'enter the compressor B, through the inlet ports 36. A regulating or cutoff valve 7 G ofany. suitable construction is. located in the conveying pipe 74. .This valve is provided with an arm 77 secured to the stem thereof.

An eccentric l78 keyed on the main drive shaft A, is connected with thearm TT'by As the shaft rotates, thevalve 7 G will first be opened and then-closed to irstadinit' and then cut oif .the supply of hydrocarbon, gas 4or other explive medium from the compressor B,

' governor valve S0 is placed on pipe 70 just outside-of .chamber D, and between the connection and the threeway .valve 7 3.

A wheel 81, is keyed on the main shaft A and a belt oicliain 81connects the wheel 8l rand the governor. valve 8O whereby, when the shaft A is rotating too rapidly, to operate the governor valve 8O toclose the pipe 70. and restrict the lamount of the charge entering the air and gas compressor The apertures through which the mainv shaft A and the pipe 70 protrude, are suitably packed'.

The coniiningled air 'and hydrocarbon drawn by suction into the compressor B,- wherein it is further commingled and compressed, issuing from one or the other of exhaust ports 37, 37 to branch pipes S2, 82as the case may be.

A three-wayvalve Sisiinilar to valve 73 is located at the meeting pointof branch pipes 82, S2 and permits thel compressed cominingled air and hydrocarbon to issue from either branchpipe into main pipe 85.- A check valve 8G .is located in this main pipe to prevent the return of the compressed air and hydrocarbon. Also a'brancli pipe 87 1S connected with main pipe .85, the branch pipehaving a check valve SS located therein.

The branch-pipe 8.7 leads toa Storage tank 89 supported from the ceiling of the chamber D, and as the coml'n'essed'air'a-nd hydrocarbon passes through the main pipe S5, the

force thereof will openthecheck valve 88 and permit the passage of the explosive mixture up branch pipe ST to the storagetank 89 where it is kept under pressure until required to start the explosive engine, as will be described shortly. Of course, as soon, as the pressure of the. compressed air and'hydro vcarbon in the tank' 89 equals that of the compressed air and hydrocarbon passing through the main pipe, the check valve will be closed and-no more can pass into the storage tank on account of the pressure exerted ber C.

on the check valve S8 by that already in the tank. The remaining portion of compressed air and hydrocarbon passes on to the explosive engine C, through an aperture 90, protected by the check valve 90. This engine is strongly built and consists of a chamber C into which extend insulated electrodes 92, 92 suitably connected by means of insulated wires 93, 93 to batteries or other suitable source of electrical energy, noty shown. These wires pass out of the chamber C, through binding posts 9-1, 9st and to these binding posts are connected the wires leading to the battery or other source. v

An eccentric 95 is fastened on the main shaft A, and is provided with the usuall strap 00, to which is connected an arm 9S,

lb means of a )in 0T. This arm JS )ro'ccts through a suitably packed aperture J0 into the explosive chamber C. the arm is hollow and is provided with slots 100 to receive studs 10.1 projecting from the stem 102 of a head 103. This head is normally forced outward by means of a spring' 10:1 seated in t|he hollow rod. rl`his head 103 is located directly beneath the. two electrodes 92, 9'2 and as the eccentric 05' revolves'.l the head 103 isforced alternately between and withdrawn from contact with the electrodes whereby to cause a spark and ignite the charge of com'iningled compressed air and hydrocarbonreceived in the explosion chamconnected by .means of a lilik 10S) to one armv of a bell-crank lever 110 pivoted to a post 11 1 secured to the upper side of the chamber The inner end of l). This bell crank lever is operated by a rodllQ, secured to its free arm. lYhcn the pull ancpush rod 112 is operated in'either directies., it causes' the 'link 109 to open the valve 106 to permit the escape of-an explosive charge to the explosive chamber C, and to close the valve. As soon as a rsufficientclrarge has been admitted, the operator will push a button which will actuate a separate circuit, the wires of which are designated by the numeral 113 to cause a spark between the sparking'v plug members 115 to explode the charge. As soon as the engine isA in full operation, the method heretofore described involving the use of eccentric 95, rod 98 and springlpressed head 103 may be re sorted to. The explosion thus caused drives the burned gases out through the pipe 169 connectedl tothe combustion chamber and to the motor respectively, thus providing the motive power which operatesthe pistons in the motors.

The purpose of the three way valve T3 is to convey the charges toone side or'the other of the compressor B, 4the piston of which is driven by the main or line shaft A and the shaft in turn being driven by the motor, not shown. Thus when the direction of rotationof the shaft A is reversed, the direction of rotation of the piston in the compressor is reversed as well, for which reason the compressor is provided with two inlet. ports and two outlet ports, and the valves 73 and 8 are simultaneously reversed by means of the `universal lever 00. f

The air tight chamber l), may be filled with oil or other cooling medium if desired and receptacles lll filled with sulfuric acid or other suitable cooling means may be disposed aboutthe interior of the chamber to aid in cooling the latter and prevent an excessive temperature therein.

lt will be seen that man v changes and alterations might. be .made in the form andan'- rangement .of the parts described without departing from the spirit and scope of my invention and hence .T do not wish to limit in vself tothe exact construction herein set forth. Having thus fully described my device, what I claim as new and desire to secure by Letters Patent,

1. In an explosive engine, the combination with a combustion chamber, of a pair of stationary electrodes therein. a. source of com. vpressed explosive materiali' a reciprocatingr arm received through the chamber, a main shaft adapted to reciprocate the arm, and a pin received in the arm for making mechanical and electrical contact with the electrodes.. Q. .ln an explosive engine, the combination with a conibustion chamber provided'with a plurality of stationary electrodes 4spaced apart from each other, of an arm passing loosely through the wall of the combustion chamber, ain-ain line shaft, an"ecce1 itric iis mounted thereon, an eccentric strap surrollnding the eccentric, the outer end of the pvotally' connected to .the eccentric 'v strap, a headed pin loosely connected to the 3. In Ian explosive engine, the combination with @combustion chamber, and stationary' electrodes mounted 1n the combustion chainber, of an. arm passingthroughthe Wall of the chmber,4 a main line shaft, `an eccentric on the shaft, said eccentric secured to the i erin, and a hetled pinadapted to be received in the drin, said headed pin adapted to be thrown in contactl with the stationaryv electrodes.

In testiinonv1 whereof, I have Signed this specification in the presence of two subscrilo- 20 ing Witnesses.

Y HUGH T. DUNN.

lVitnesses Jol-IN J. CALLAGY, PATRICK J. COFFEY. 

